具氫鍵高分子摻合體結晶型態與小角度X光散射研究

Study on the pattern of crystallization and small angle x-ray scattering of polymer blend with H-bond

吳佩勳(Pei-Hsun Wu)

指導教授 ： 黃振球

元智大學/工程學院/化學工程與材料科學學系/碩士(1998年)

摘要

由先前的研究得知，當高分子摻合體分子間作用力大時，該摻合系統的結晶型態應由晶體成長速率所控制。
本研究主要討論具氫鍵作用力PEO與PVPh摻合系統的結晶型態。摻合系統的結晶度是利用DSC來分析，而摻合系統的晶體成長速率與結晶型態是藉由POM觀察之，SAXS則是測量晶層堆疊中結晶層厚度（lc），無定形層厚度（la）以及長週期厚度（L，L = lc + la）。
我們發現PEO / PVPh blends 60/40、70/30，經過長時間的等溫結晶後，球晶不會相互接觸，計算其晶體成長速率，發現其為非線性成長。而晶層堆疊中的無定形層厚度並不因無定形組成的增加而增加。
因此，我們認為PEO與PVPh摻合系統之結晶型態為罕見的interspherulitic segregation型態。

關鍵字

非線性成長 ； 晶層堆疊 ； Interspherulitic segregation型態

並列摘要

It was found in the previous study that the pattern of crystallization is controlled by the growth rate of spherulites while the intermolecular force of polymer blends was great.
This research mainly discussed the pattern of crystallization of polymer blends ( PEO / PVPh ) with H-bond. The degree of crystallization in polymer blends was characterized by DSC ; the growth rate of spherulites and the pattern of crystallization were examined by POM ; SAXS was used to determine the thickness of crystallization layer (lc), amorphous layer (la) and long period layer (L, L = lc + la).
We found that the spherulites did not contact each other in PEO / PVPh blends 60/40 and 70/30 after annealing for a long time. Then computed the growth rate of spherulites, we discovered the result presented non-linear growth . However, the thickness of amorphous layer in lamellar stacks did not increase with increasing the amorphous composition.
As the result, the pattern of crystallization of polymer blends ( PEO / PVPh ) was an uncommon interspherulitic segragation morphology.

並列關鍵字

non-linear growth ； lamellar stacks ； Inerspherulitic segragation morphology

參考文獻

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